Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh vi » hanh vi, thanh va, thanh ve
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, nang ma
va tham » van tham, va cham, va thanh
luc van » luoc van, duc van, luc va
luu van » cuu van, luan van, luu hanh
cua tre » cua te, cuu tre, dua tren
y nang » ky nang, ly nang, v nang

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang xa hoi. lieu va tham ((luc van) OR (luu van)) thanh vi ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y nang xa hoi. lieu va tham ((luc van) or (luu van)) thanh vi ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: vu sach y nang xa hoi. lieu va tham ((luc van) or (luu van)) thanh vi ((cua tre) OR (cua triet))*.